Drill or boring member.



H. J. WATTS. DRILL OR BORING MEMBER.- APPLICATION FILED NOV. 1. 1916.

i atented Sept. 25; 1917.

openings a master gui through whi ter guide th and it is a to provide a lands thereof having curved and disposed eccentrically with respect to the axis of ing theop cally curve the master guid ed corners a the polygonal in the work.

provide a to with grooves the opening provide one of the cutting end disposed at latter is formed number of walls of rough further object of the invention drill or boring member with A. further which is simple in its construction and ardurable, eflicient and rangement, strong,

all whom it may concern:

ch operates with one less land than the Fig. l is an end view of the tool.

Fig. 5 is a section on line V-V.

. 6 is a section on line Referring to the drawings in drical shank eratlon of the tool, the eccentrid peripheries of the lands will follow the walls of the opening in the e to prevent t the junction of the walls of object of the provide a tool for the purpose set forth with a shank in a cylindrical or squared'tool soc A further object of the ol forthe purpose referred to for the passage of being an angle with respect to the direction of the length of the groove to cause the lifting of the chips or cuttings out of the opening bei passage of the chips or cutting through the grooves to the point of discharge.

Further objects of the invention are to provide a tool for the purpose set arena tries.

BARRY J. WATTS, OF TURTLE CREEK, PENNSYLVANIA.

DRILL on BORING MEMBER.

& Specification of Letters Patent.

HARRY J. WA'rrs, a England, residing at of Allegheny, and have invente oer- Drills of which the following that I, of

primarily for forming openings, and has for its a tool of such type, in a scop further with urt to characters the tool so as no Figure de 1S employed and the tool and the TIL-III Fig.

the opening of the maswhich the 'tool operates, Fig

notes a cylin the periphery the tool, whereby durextended or roundshaped opening being formed invention is to ooves 3.

having means for securing it ket. mventlon 18 to ata chips from of less depth formed, and tofurther the Walls of each groove at of the tool with concavity so as to facilitate the formed forth convenient in its use, erative purposes and pensive to manufacture.

With the foregoing and other objects in view the invention consists of the novel construction, combination and arrangement of parts, as hereinafter scribed and illustrated in the drawings, wherein is shown an embo of the lnvention,

can be resorted In the drawings wherein denote ward the cutting end of Fig. 2 is an elevation 'of the tool.

Fig. 3 is a vertical sectional view on line integral with the body portion and said body portion 2 is of greater eter than the shank 1.

The body'portion 2 is formed with a plurality of lengthwise grooves three in number and which correspon to the number of cutting edges to be presently referred to. of cutting edges a like change is These the discharge of the chips or the opening being walls of each of the grooves at l, 5, and which are disposed with respect to each other. Th

greater angle than the wall 5 andis 5. The grooves 3 at their'rear ends are curved outwardlyto of the chips or cuttings than the wall direct the discharge away from the shan 'The forward terminus Patented Sept. 25, 1217.

Application filed November 1, 1916. Serial No. 128,880.

but it is the tool.

formed by the tool..

the groove 3 an the tool with readily set up for opcomparatively inexmore specifically 'deaccompanying iment to be understood that changes, variations and modifications to which come within the e of the claims hereunto appended.

ike reference corresponding parts throughout the several views'.-.

1 is a perspective view looking todetail 1 dewhich is formed 2 of the tool,

diam- 3, as shown f the number is reduced or increased had in the number of latter are employed for cuttings from The 3 are indicated at an angle e wall 4 is of each of the walls 5 provides a cutting edge 6 which is eccentrically disposed with respect axis of the body portion walls 5 in proximity to is formed with a cone an angle with respect which provides termed a curved on lip.

to the 2, and each of the its forward terminus avity 7 extending at what may be The function A tool for the of the concavities 7 is to cause a lifting of the chips or cuttings out of theopenings being formed to prevent clogging and to facilitate discharge thereof through the grooves 3.

The providing of the grooves 3 form the body portion 2 with a plurality of lands 8 and each of which extends from the Wall 5 of one groove to the wall 4 of an adjacent groove. The periphery of each land 8, is upon a curve of less radius than the are corresponding to the are upon which the body portion is made and which provides the periphery or outer face .of each land eccentric with respect to the axis of the body portion. The lands are of equal size and the grooves equi-distant. The reference character 9 denotes a clearance back from each cutting edge 6 allowing the latter to cut freely.

The shank 1 at its rear end is formed with an opening 10 in which is frictionally secured a pin 11, the latter having its ends projecting from the shank 1. The pin 11 is employed when using the shank in a squared tool socket which prevents the turning of the tool. When using the shank in a cylindrical tool socket the pin is removed.

The curving of the periphery of the lands eccentrically with respect to the axis of the body portion 2 will cause the lands to follow. the walls of the opening of the master guide through which the tool operates, in such a manner as to prevent extended or rounded corners at the junction of the walls of the polygonal shaped opening being formed in the work operated on.

The outer terminus of each of the walls 5 is slightly rounded which facilitates the operation of the tool when revolving within the opening of master guide.

at I claim is purpose set forth comprising a body portion having lands with the periphery'thereof disposed eccentrically said body portion further ing one wall thereof in proximity to a cutting edge provided with a concavity disposed at an angle with respect to the direction of length of the groove.

2. A tool for the purpose set forth comprising a body portion having lands with the periphery thereof disposed eccentrically with respect to the axis of the body portion, said body portion further having one end provided with cutting edges disposed eccentrica-lly with respect to the axis thereof, and said body portion further having lengthwise grooves between the lands, said grooves leading from the cutting edges and each having one wall thereof in proximity to a cutting edge provided with a concavity disposed at an angle with respect to the direction of length of the groove, a shank integral with said body portion, and each of said grooves having the rear end curved v outwardly to discharge thechips or cuttings away from the shank.

3. A tool for! the purpose set forth comprising a body portion having 'lands with the periphery thereof disposed eccentrically with respect to the axis of the body portion, said body portion further having one end provided with cutting edges disposed eccentrically with respect to the axis thereof, and

having lengthwise grooves between the lands, said grooves extending from the cutting edges.

In testimony whereof I afiix my signature in the presence of two witnesses.

HARRY J. WATTS.

Witnesses Max H. SRoLovrrz, B. E. JENKINS. 

